kennedy



No Model.) J. KENNEDY.

I APPARATUS FOR HOLDING D'REDGE$ IN PLACE. No. 447,717;

Patented Mar. 3, 1891.

wamm UNITED STATES JOHN KENNEDY, OF MONTREAL, CANADA.

APPARATUS FOR HOLDING DREDGES IN PLACE.

SPECIFICATION forming part of Letters Patent No. 447,717, dated March 3,1891.

Application filed May 12, 1890. Renewed February 9, 1891. Serial No.380,727- (No model.)

To all whom it may concern:

Be it known that 1, JOHN KENNEDY, civil engineer, of the city ofMontreal, in the district of Montreal and Province of Quebec, Canada,have invented certain new and useful Improvements in Apparatus forHolding Dredges in Place; and I do hereby declare that the following isa full, clear, and exact description of the same.

My invention relates to the means by which the spuds of dipper-dredgesare held in place at any height relatively to the hull, and provides adevice by which they may be secured at the point desired and themovement of the spud controlled. It may be thus briefly described:Across the face of the spud are placed at any suitable height and inrecesses formed on the faces of the guide-posts bars or plates, andacross the inner side of these guide-posts at the same level is arrangeda clamping-plate, which, with the two bars, is secured to theguide-posts by screw-bolts passing through them. On the inner side ofthis clampingplate is mounted at some little distance from it a platesecured in place by bolts passing through the clamping-plate and bars;On this plate is formed a threaded seat, in which works a screw actingagainst the clampingplate. To the inner face of the spud are secured oneor more plates or straps attached thereto by any suitable means. Thesepass down between the horizontal bars and between the inner one and theclamping-plate, just sufficient play being given to allow them to passeasily up and down. It will be seen that to stop the vertical movementof the spud and secure it at the point desired all that is needed is toturn the screw and press the horizontal bars and vertical strapstogether, and thus hold the vertical straps and the spud fast, or bymodifying the pressure control the rate of its movement.

In the drawings hereto annexed and forming part of this specification,Figure 1 is a perspective view of the spud and guide-posts at one sideof the bow of the dredge; Fig. 2, a vertical side elevation and partsectional view of same; Fig. 3, a front elevation, and Fig. 4

a horizontal section, of same on line Z Z, Fig. 2.

Like symbols de note the same parts.

A is a hull of the dredge, and B B the two guide-posts, these beingrecessed on their in= ner faces, as shown at b b, and O is the spud.

D D are the horizontal bars of steel or iron set in the recesses 12 b,and E the clampingplate, (I (Z being bolts passing through these and theguide-posts.

F F are'straps or plates secured on the inner face of the spud andrunning nearly itswhole length. These pass as is shown, Fbetween thebars D D and F between the bar D and plate E, being so arranged thatwhile close together the straps will slide easily up and down. Blocks clcl maybe inserted between the ends of the plates D, D, and E, so as toprevent them from being brought into close proximity to eachother by theclamping device, to be presently described.

G is a plate secured in place by bolts g, passing loosely through theplate E and bar D and secured in bar D.

In the threaded seat G works a turn-screw H, bearing against theclamping-plate E at the point of intersection of the bars D D and strapsF F. By turning this screw the plate, bars, and straps are clamped andpressed together, the meeting surfaces of the former coming into-actualcontact with those of the latter and gripping them and holding themfast, and, if desired, this arrangement may be applied to more than oneside of the spud.

The horizontal bars or plates may be attached to or carried by theguide-posts, or be supported upon any suitable frame, &c., mounted uponthe deck of the dredge. Any means other than the screw may be used toclamp the horizontal bars and vertical straps together, and if more thanone strap be used the one nearest the spud may be secured to it orcaused to bear against it by clamping.

Having thus described myinvention, I beg to state that what I claim isas follows:

1. In apparatus for holding dredges, the combination of the followingelements, viz: horizontal bars or plates secured to the guideposts orcarried on and connected with the thereto, straps F F, secured to spud Cand hull of the dredge, a Vertical strap or straps passing between suchclamps, and screw II, 10 secured to thespud and passinghetween suchworking in plate G and against clamp E, all bars, and means for holding"such straps and substantially as herein set forth.

5 bars together at any desired point, all as JOIIN KENNEDY.

herein described. Witnesses:

2. The combination of the guide-posts B B, GEO. SMART,

bars D D, and clamping-plate E, attached ILL. P. MOFEAT.

